30th International Auction

1931, 5c. violet optd. 'Postag' with INTERRUPTED PERFORATION, used on red band cover from Ulan Bator on Sept. 7, 1931 to China, also franked by 20c. brown optd. 'Postag', and by Chinese postage due stamps 30c. blue and a further one which was lost, indistinct strikes of arrival datestamps. An important variety which is still uncatalogued (but described by Hellrigl). ONE OF TWO COVERS DISCOVERED RECENTLY, which enlarge the small group of covers known to exist. AN IMPORTANT VARIETY. Catalog Price 400.00